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charset="utf-8" Add new compatible string 'fsl,imx952-asrc' for i.MX952 platform Signed-off-by: Shengjiu Wang --- Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml b/Do= cumentation/devicetree/bindings/sound/fsl,imx-asrc.yaml index c9152bac7421..608defc93c1e 100644 --- a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml +++ b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml @@ -25,6 +25,7 @@ properties: - fsl,imx53-asrc - fsl,imx8qm-asrc - fsl,imx8qxp-asrc + - fsl,imx952-asrc - items: - enum: - fsl,imx6sx-asrc --=20 2.34.1 From nobody Sun Feb 8 17:04:15 2026 Received: from MRWPR03CU001.outbound.protection.outlook.com (mail-francesouthazon11011030.outbound.protection.outlook.com [40.107.130.30]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BDF041D9346; 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charset="utf-8" Add a compatible string and clock mapping table to support ASRC on the i.MX952 platform. There is a limitation on i.MX952 that dma request is not cleared at the end of conversion with dma slave mode. Which causes sample is dropped from the input fifo on the second time if dma is triggered before the client device and EDMA may copy wrong data from output fifo as the output fifo is not ready in the beginning. So need to trigger asrc before dma on i.MX952, and add delay to wait output data is generated then start the EDMA for output, otherwise the m2m function has noise issues. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/fsl_asrc.c | 39 +++++++++++++++++++++++++++++++++ sound/soc/fsl/fsl_asrc.h | 16 ++++++++++++++ sound/soc/fsl/fsl_asrc_common.h | 3 +++ sound/soc/fsl/fsl_asrc_m2m.c | 29 +++++++++++++++++------- 4 files changed, 79 insertions(+), 8 deletions(-) diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c index 92fb16f7be45..5a038efed39c 100644 --- a/sound/soc/fsl/fsl_asrc.c +++ b/sound/soc/fsl/fsl_asrc.c @@ -106,6 +106,12 @@ static unsigned char clk_map_imx8qxp[2][ASRC_CLK_MAP_L= EN] =3D { }, }; =20 +static unsigned char clk_map_imx952[ASRC_CLK_MAP_LEN] =3D { + 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf= , 0x0, + 0x0, 0x1, 0x2, 0x3, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x4, 0x5, 0x6, 0x8, 0xf= , 0xf, + 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x7, 0x9, 0xa, 0xb, 0xc, 0xd, 0xf, 0xf, 0xf= , 0xf, +}; + /* * According to RM, the divider range is 1 ~ 8, * prescaler is power of 2 from 1 ~ 128. @@ -1078,6 +1084,27 @@ static unsigned int fsl_asrc_get_output_fifo_size(st= ruct fsl_asrc_pair *pair) return val >> ASRFSTi_OUTPUT_FIFO_SHIFT; } =20 +static bool fsl_asrc_m2m_output_ready(struct fsl_asrc_pair *pair) +{ + struct fsl_asrc *asrc =3D pair->asrc; + enum asrc_pair_index index =3D pair->index; + int retry =3D 1000; + u32 val; + + do { + regmap_read(asrc->regmap, REG_ASRFST(index), &val); + val &=3D ASRFSTi_OUTPUT_FIFO_MASK; + val =3D val >> ASRFSTi_OUTPUT_FIFO_SHIFT; + } while (val < ASRC_M2M_OUTPUTFIFO_WML && --retry); + + if (!retry) { + pair_warn("output is not ready\n"); + return false; + } + + return true; +} + static int fsl_asrc_m2m_prepare(struct fsl_asrc_pair *pair) { struct fsl_asrc_pair_priv *pair_priv =3D pair->private; @@ -1275,6 +1302,7 @@ static int fsl_asrc_probe(struct platform_device *pde= v) =20 asrc_priv->soc =3D of_device_get_match_data(&pdev->dev); asrc->use_edma =3D asrc_priv->soc->use_edma; + asrc->start_before_dma =3D asrc_priv->soc->start_before_dma; asrc->get_dma_channel =3D fsl_asrc_get_dma_channel; asrc->request_pair =3D fsl_asrc_request_pair; asrc->release_pair =3D fsl_asrc_release_pair; @@ -1289,6 +1317,7 @@ static int fsl_asrc_probe(struct platform_device *pde= v) asrc->m2m_get_maxburst =3D fsl_asrc_m2m_get_maxburst; asrc->m2m_pair_resume =3D fsl_asrc_m2m_pair_resume; asrc->m2m_get_cap =3D fsl_asrc_m2m_get_cap; + asrc->m2m_output_ready =3D fsl_asrc_m2m_output_ready; =20 if (of_device_is_compatible(np, "fsl,imx35-asrc")) { asrc_priv->clk_map[IN] =3D input_clk_map_imx35; @@ -1315,6 +1344,9 @@ static int fsl_asrc_probe(struct platform_device *pde= v) asrc_priv->clk_map[IN] =3D clk_map_imx8qxp[map_idx]; asrc_priv->clk_map[OUT] =3D clk_map_imx8qxp[map_idx]; } + } else if (of_device_is_compatible(np, "fsl,imx952-asrc")) { + asrc_priv->clk_map[IN] =3D clk_map_imx952; + asrc_priv->clk_map[OUT] =3D clk_map_imx952; } =20 asrc->channel_avail =3D 10; @@ -1553,11 +1585,18 @@ static const struct fsl_asrc_soc_data fsl_asrc_imx8= qxp_data =3D { .channel_bits =3D 4, }; =20 +static const struct fsl_asrc_soc_data fsl_asrc_imx952_data =3D { + .use_edma =3D true, + .channel_bits =3D 4, + .start_before_dma =3D true, +}; + static const struct of_device_id fsl_asrc_ids[] =3D { { .compatible =3D "fsl,imx35-asrc", .data =3D &fsl_asrc_imx35_data }, { .compatible =3D "fsl,imx53-asrc", .data =3D &fsl_asrc_imx53_data }, { .compatible =3D "fsl,imx8qm-asrc", .data =3D &fsl_asrc_imx8qm_data }, { .compatible =3D "fsl,imx8qxp-asrc", .data =3D &fsl_asrc_imx8qxp_data }, + { .compatible =3D "fsl,imx952-asrc", .data =3D &fsl_asrc_imx952_data }, {} }; MODULE_DEVICE_TABLE(of, fsl_asrc_ids); diff --git a/sound/soc/fsl/fsl_asrc.h b/sound/soc/fsl/fsl_asrc.h index 1c492eb237f5..1be93148a879 100644 --- a/sound/soc/fsl/fsl_asrc.h +++ b/sound/soc/fsl/fsl_asrc.h @@ -324,6 +324,13 @@ enum asrc_inclk { INCLK_SAI6_TX_BCLK =3D 0x22, INCLK_HDMI_RX_SAI0_RX_BCLK =3D 0x24, INCLK_HDMI_TX_SAI0_TX_BCLK =3D 0x25, + + INCLK_SAI2_TX_BCLK =3D 0x26, + INCLK_SAI3_TX_BCLK =3D 0x27, + INCLK_SAI4_RX_BCLK =3D 0x28, + INCLK_SAI4_TX_BCLK =3D 0x29, + INCLK_SAI5_RX_BCLK =3D 0x2a, + INCLK_SAI5_TX_BCLK =3D 0x2b, }; =20 enum asrc_outclk { @@ -364,6 +371,13 @@ enum asrc_outclk { OUTCLK_SAI6_TX_BCLK =3D 0x22, OUTCLK_HDMI_RX_SAI0_RX_BCLK =3D 0x24, OUTCLK_HDMI_TX_SAI0_TX_BCLK =3D 0x25, + + OUTCLK_SAI2_TX_BCLK =3D 0x26, + OUTCLK_SAI3_TX_BCLK =3D 0x27, + OUTCLK_SAI4_RX_BCLK =3D 0x28, + OUTCLK_SAI4_TX_BCLK =3D 0x29, + OUTCLK_SAI5_RX_BCLK =3D 0x2a, + OUTCLK_SAI5_TX_BCLK =3D 0x2b, }; =20 #define ASRC_CLK_MAX_NUM 16 @@ -432,10 +446,12 @@ struct dma_block { * * @use_edma: using edma as dma device or not * @channel_bits: width of ASRCNCR register for each pair + * @start_before_dma: start asrc before dma */ struct fsl_asrc_soc_data { bool use_edma; unsigned int channel_bits; + bool start_before_dma; }; =20 /** diff --git a/sound/soc/fsl/fsl_asrc_common.h b/sound/soc/fsl/fsl_asrc_commo= n.h index 0cd595b0f629..23ac516565d2 100644 --- a/sound/soc/fsl/fsl_asrc_common.h +++ b/sound/soc/fsl/fsl_asrc_common.h @@ -107,6 +107,7 @@ struct fsl_asrc_pair { * @asrc_rate: default sample rate for ASoC Back-Ends * @asrc_format: default sample format for ASoC Back-Ends * @use_edma: edma is used + * @start_before_dma: start asrc before dma * @get_dma_channel: function pointer * @request_pair: function pointer * @release_pair: function pointer @@ -143,6 +144,7 @@ struct fsl_asrc { int asrc_rate; snd_pcm_format_t asrc_format; bool use_edma; + bool start_before_dma; =20 struct dma_chan *(*get_dma_channel)(struct fsl_asrc_pair *pair, bool dir); int (*request_pair)(int channels, struct fsl_asrc_pair *pair); @@ -154,6 +156,7 @@ struct fsl_asrc { int (*m2m_start)(struct fsl_asrc_pair *pair); int (*m2m_unprepare)(struct fsl_asrc_pair *pair); int (*m2m_stop)(struct fsl_asrc_pair *pair); + bool (*m2m_output_ready)(struct fsl_asrc_pair *pair); =20 int (*m2m_calc_out_len)(struct fsl_asrc_pair *pair, int input_buffer_leng= th); int (*m2m_get_maxburst)(u8 dir, struct fsl_asrc_pair *pair); diff --git a/sound/soc/fsl/fsl_asrc_m2m.c b/sound/soc/fsl/fsl_asrc_m2m.c index f46881f71e43..296e13a16490 100644 --- a/sound/soc/fsl/fsl_asrc_m2m.c +++ b/sound/soc/fsl/fsl_asrc_m2m.c @@ -253,15 +253,28 @@ static int asrc_m2m_device_run(struct fsl_asrc_pair *= pair, struct snd_compr_task reinit_completion(&pair->complete[IN]); reinit_completion(&pair->complete[OUT]); =20 - /* Submit DMA request */ - dmaengine_submit(pair->desc[IN]); - dma_async_issue_pending(pair->desc[IN]->chan); - if (out_dma_len > 0) { - dmaengine_submit(pair->desc[OUT]); - dma_async_issue_pending(pair->desc[OUT]->chan); 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charset="utf-8" As the dma device may support dma-coherent property on the i.MX952, allocate memory from dma device to make asrc driver to be compatible with such a case. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/fsl_asrc_dma.c | 48 ++++++++++++++++++++++++++++++------ 1 file changed, 41 insertions(+), 7 deletions(-) diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c index 7dacc06b2f02..b8fe242d53db 100644 --- a/sound/soc/fsl/fsl_asrc_dma.c +++ b/sound/soc/fsl/fsl_asrc_dma.c @@ -449,18 +449,52 @@ fsl_asrc_dma_pcm_pointer(struct snd_soc_component *co= mponent, static int fsl_asrc_dma_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd) { - struct snd_card *card =3D rtd->card->snd_card; + struct device *dev =3D component->dev; + struct fsl_asrc *asrc =3D dev_get_drvdata(dev); + struct fsl_asrc_pair *pair; struct snd_pcm *pcm =3D rtd->pcm; + struct dma_chan *chan; int ret; =20 - ret =3D dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); - if (ret) { - dev_err(card->dev, "failed to set DMA mask\n"); - return ret; + pair =3D kzalloc(sizeof(*pair) + asrc->pair_priv_size, GFP_KERNEL); + if (!pair) + return -ENOMEM; + + pair->asrc =3D asrc; + pair->private =3D (void *)pair + sizeof(struct fsl_asrc_pair); + + /* Request a dummy pair, which will be released later. + * Request pair function needs channel num as input, for this + * dummy pair, we just request "1" channel temporarily. + */ + ret =3D asrc->request_pair(1, pair); + if (ret < 0) { + dev_err(dev, "failed to request asrc pair\n"); + goto req_pair_err; } =20 - return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, - card->dev, FSL_ASRC_DMABUF_SIZE); + /* Request a dummy dma channel, which will be released later. */ + chan =3D asrc->get_dma_channel(pair, IN); + if (!chan) { + dev_err(dev, "failed to get dma channel\n"); + ret =3D -EINVAL; + goto dma_chan_err; + } + + ret =3D snd_pcm_set_fixed_buffer_all(pcm, + SNDRV_DMA_TYPE_DEV, + chan->device->dev, + FSL_ASRC_DMABUF_SIZE); + + dma_release_channel(chan); + +dma_chan_err: + asrc->release_pair(pair); + +req_pair_err: + kfree(pair); + + return ret; } =20 struct snd_soc_component_driver fsl_asrc_component =3D { --=20 2.34.1